Hi
I had my farm house replumbed three years ago. Every summer, when I turn off the heating, I notice that the radiators still heat up when the boiler hot water circuit is on.
The boiler has motorised valves on the separate h/w and heating feed, but both circuits share a common return.
Having lifted a few floorboards, it seems the plumber connected the returns from various radiators to the common return in at least two places. I suspect hot water from the h/w cylinder circuit is convecting, or being pumped backwards through the radiator circuit (?).
In previous years I've just turned off the rads. Now that oil prices have hit the roof, it's time to properly isolate the HW from the heating circuit.
Is it simply a matter of installing non return valves into the heating return pipes where they join the common return?
Hey - thanks!
Bob
I had my farm house replumbed three years ago. Every summer, when I turn off the heating, I notice that the radiators still heat up when the boiler hot water circuit is on.
The boiler has motorised valves on the separate h/w and heating feed, but both circuits share a common return.
Having lifted a few floorboards, it seems the plumber connected the returns from various radiators to the common return in at least two places. I suspect hot water from the h/w cylinder circuit is convecting, or being pumped backwards through the radiator circuit (?).
In previous years I've just turned off the rads. Now that oil prices have hit the roof, it's time to properly isolate the HW from the heating circuit.
Is it simply a matter of installing non return valves into the heating return pipes where they join the common return?
Hey - thanks!
Bob